HiMy marine set up has been running for about 10 months. I have a jasmin, a toadstool and i had some little yellow daisy like polyps, but they died. But recently i have had some new visitors as seen in the piccy. Two shown in the center and one more out of shot. All on seperate pieces of rock. They are growing fast while my jasmine seems to be weakening. The stem and the crown is about 2 inches high. I cant recall seeing anything like them on line or in shops. Can anyone tell me what they are and if they are harmfulThanks a lotDougTrappersam

Hi Again Luckily the three monsters were on 3 different pieces of rock whick i could remove fairly easily. So armed with a boiling kettle i removed each rock gave the offending offspring a bath in boiling water, scraped the remains off with a knife and scrubbed with a stiff nail brush. Hopefuly i didnt do too much damage to the rest of the rock, only time will tell.Then slightly re arranged my tank which i have needed to do to show my toadstool off better as it is getting bigger. So overall a good days work.(i hope).If they return i shal buy a couple of burghia nudibranchDeath to all AiptasiaThanks again